Ara mostrant els elements 128-147 de 147
Gordo Villoslada, Óscar (Data de defensa: 2006-12-01)
The spatial and temporal variability of migratory phenology of <i>Ciconia ciconia, Cuculus canorus, Apus apus, Hirundo rustica</i> and <i>Luscinia megarhynchos</i> were studied by means of 44000 records for 1400 spanish ...
Esteve Cavaller, Manuel (Data de defensa: 2005-02-25)
Long-term data from underwater video recordings in the wild and in semi-natural channels are used to describe and compare the reproductive behaviour of fishes in the Salmoninae subfamily. The thesis is divided into five ...
Richter Boix, Alex (Data de defensa: 2006-01-20)
The thesis research concerned evolutionary ecology and community ecology of amphibians in two different areas of a Mediterranean region. The goal of the research was to test how anuran species coexist along a lentic ...
Guallar, Santi (Data de defensa: 2021-04-09)
Molt is the process of plumage renewal by which birds maintain and adjust its functionality throughout their lifecycle. Multiple elements have been tackled in bird molt research (timing, duration, sequence, intensity, ...
Stegun Vidigal, Vera Cristina (Data de defensa: 2015-01-21)
The short-tailed opossums of the genus Monodelphis Burnett, 1830 are small-bodied semifossorial marsupials which inhabit almost all major biomes of South America up to 2200 m. Even though it is one of the most speciose ...
Cebrian Pujol, Emma (Data de defensa: 2007-04-20)
Many antrophic activities release pollutants to the marine environment. Among them heavy metals are of great importance, since they are conservative pollutants, which can be accumulated through trophy chains. Sometimes, ...
Ávila Escartín, Conxita (Data de defensa: 1993-05-10)
Los Moluscos Opistobranquios, en relación a la reducción o incluso pérdida de la concha, han desarrollado múltiples y sofisticados métodos de defensa (incluyendo la defensa química) que les han permitido sobrevivir sin ...
Morais Pinela, Ana (Data de defensa: 2015-07-15)
Distinguishing population units of small cetaceans continuously distributed in a widespread area is challenging, but critical for their conservation and management. The common dolphin (genus Delphinus) has a wide distribution ...
Motis Berta, Anna (Data de defensa: 1994-03-01)
En la present memòria s'analitzaran els aspectes que fan referència a les relacions territorials intra/interspecífiques de "Sturnus vulgaris" i "Sturnus unicolor", i les seves conseqüències en el marc reproductor. D'una ...
Mateos González, Fernando (Data de defensa: 2012-09-07)
El uso de señales múltiples de calidad es común en numerosas especies, pero este hecho no es fácil de explicar. Las presiones fluctuantes del ambiente podrían tener un rol importante en el origen y mantenimiento de las ...
Arias Martorell, Júlia (Data de defensa: 2014-12-05)
The Doctoral Thesis entitled "the glenohumeral joint of hominoid primates: locomotor Correlates, anatomical variation and evolution" is about the anatomical adaptations in the shoulder joint (glenohumeral joint) of hominoid ...
Martínez Salmeron, Debora (Data de defensa: 2014-07-15)
Over time, many studies about deer antlers, based on classical morphometry, have been done. The present study propose a new perspective on the study of Iberian red deer antlers (Cervus elaphus hispanicus) from Sierra Morena ...
García-Tarrasón, Manuel (Data de defensa: 2014-12-19)
The results presented in this thesis have shown the strong dependence of Audouin’s gull from the Ebro Delta on fisheries. Foraging movements of breeding birds showed a great association with fishing activities (specially ...
Vighi, Morgana (Data de defensa: 2016-01-19)
Cetaceans have historically been object of heavy exploitation, and are still currently subject to different threats. For conservation and management purposes, most of the large cetacean populations have been categorized ...
Ponjoan Thäns, Anna (Data de defensa: 2012-12-14)
El sisó (Tetrax tetrax) és un ocell estepari que a Europa ocupa principalment ambients agrícoles i està en declivi poblacional a causa, principalment, de la intensificació agrícola. En aquesta tesi s’analitzen aspectes poc ...
Nova Delgado, Mónica Constanza (Data de defensa: 2015-12-01)
Desde diferentes enfoques, los primates platirrinos son uno de los grupos más discutidos y debatidos. La dificultad en la comprensión de las interrelaciones a nivel familiar, la posición del género Aotus, la relación con ...
González Pérez, Emili (Data de defensa: 2009-12-17)
La família d'elements genètics Alu recents són insercions polimòrfiques disperses pel genoma humà. Les seves propietats com a marcadors neutres, amb estat ancestral conegut i identitat per descendència permeten, conjuntament ...
Carreras Torres, Robert (Data de defensa: 2014-06-20)
La diversitat observada en els grups humans ha estat àmpliament documentada per antropòlegs segons els coneixements i tècniques disponibles en cada moment. Actualment, un dels aspectes en els quals s’està invertint molt ...
Via i García, Marc (Data de defensa: 2006-07-24)
Les malalties complexes conformen en l'actualitat la principal causa de mortalitat en les societats occidentals. D'entre elles, destaquen les malalties cardiovasculars per la seva elevada incidència tot i mostrar diferències ...
Brotons, Lluís (Data de defensa: 2000-02-03)
The main objective of this thesis is to analyse the variation in non-breeding social systems within the group of parids and to identify the main factors involved. More specifically, I studied the role of food hoarding on ...